Effects of nanoplastics on energy metabolism in the oriental river prawn (Macrobrachium nipponense)

Nanoplastics are common pollutants in aquatic environments and have attracted widespread research attention. However, few studies focus on the effects of nanoplastic exposure on energy metabolism in crustaceans. Accordingly, we exposed juvenile oriental river prawns (Macrobrachium nipponense) to dif...

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Published in:Environmental pollution (1987) 2021-01, Vol.268 (Pt A), p.115890-115890, Article 115890
Main Authors: Li, Yiming, Liu, Zhiquan, Yang, Yuan, Jiang, Qichen, Wu, Donglei, Huang, Youhui, Jiao, Yang, Chen, Qiang, Huang, Yinying, Zhao, Yunlong
Format: Article
Language:English
Subjects:
Animals
Energy Metabolism
Enzyme activity
Gene expression
Macrobrachium nipponense
Microplastics
Molting
Nanoplastics
Palaemonidae
Thiazoles
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Summary:Nanoplastics are common pollutants in aquatic environments and have attracted widespread research attention. However, few studies focus on the effects of nanoplastic exposure on energy metabolism in crustaceans. Accordingly, we exposed juvenile oriental river prawns (Macrobrachium nipponense) to different concentrations of 75-nm polystyrene nanoplastics (0, 5, 10, 20, and 40 mg/L) for 7, 14, 21, or 28 days. Thereafter, the effects of nanoplastic exposure on metabolite content, energy metabolism-related enzyme activity, and gene expression were evaluated. Our results showed that (1) with increasing nanoplastic concentration and exposure time, the survival rate decreased, while weight gain rate and molting number increased and then decreased; glycogen, triglyceride, and total cholesterol content all declined while lactic acid content increased with higher exposure to nanoplastic concentrations; (2) the activities of acetyl-CoA carboxylase (ACC), hexokinase (HK), carnitine palmitoyl transferase-1, pyruvate kinase (PK), lipase, and fatty acid synthase tended to decrease, while the activity of lactate dehydrogenase (LDH) increased. In particular, the activity of 6-phosphofructokinase exposed to 5 mg/L nanoplastics increased significantly (P 
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2020.115890